Depends. If a getaway is involved The Driver wins hands-down. If it's a man-on-man fight then as an ex-marine with a large arsenal and paranoid schizophrenia on his side then Bickle will emerge bloody but undefeated.

I'd like to think they'd call a truce and form a vengeance tag team!

What a tough one. Yikes! As much as I love both of these characters, I'm more inclined to go for De Niro's character "Travis" - as I think he is slightly more capable of more vulgar atrocities due to his ever deteriorating mental health.

Their essentially the same though, so I call it a draw Both have special swords, both come back from the dead (after taking on an enemy no one else can face) You wouldnt really want to see them fight. Id be more interested in seeing them take on some of those cartoon fools from the prequels together